Kathryn Bridget Moynahan was born in Binghamton, New York, on September 21, 1972, and raised primarily in Longmeadow, Massachusetts. As a child she was a self-professed tomboy, excelling at sports. In high school she was the captain of her basketball team and chose to play soccer instead of attending drama class. As fate would have it, though, drama crept into her life as the years passed. Upon graduating from Longmeadow High School, Moynahan moved to New York City in pursuit of fame. She gave herself three years to find success, after which point she would reassess her life and perhaps go back to school. This proved unnecessary when she displayed a knack for modeling. Throughout the '90s she appeared in many fashion magazines, most notably Vogue, New Woman and Shape, as well as on the cover of Glamour.

Her magnetic looks and fortuitous placement in New York were both factors in her winning her first big role in 1999, on HBO's successful series, Sex and the City. She portrayed Natasha, the woman who marries Mr. Big, on the show she is referred to as "the idiot stick figure with no soul". The exposure from her recurring role on Sex and the City led to movie roles. Her first three films were the indie flicks Whipped (starring Amanda Peet), Trifling with Fate and In the Weeds, all released in 2000. While not huge draws critically and financially, they were excellent experience for Moynahan's fast-approaching arrival in the spotlight.

Bridget Moynahan became a star thanks to her portrayal of Rachel, the fire-breathing barmaid in 2000's chick flick, Coyote Ugly. The film was a huge success, despite poor reviews, and it brought a great deal of attention to the female-filled cast. In 2001, Moynahan appeared as "the other woman" in the romantic comedy Serendipity, starring John Cusack and Kate Beckinsale. That same year, Moynahan decided to challenge herself and auditioned for the "Tom Clancy" thriller, The Sum of All Fears. She was amazed and elated to find herself reading lines with Ben Affleck two weeks later. As CIA agent Jack Ryan's fiance, Moynahan proved to be a wonderful presence as the film's only female character. It went to number one at the box office upon its summer 2002 release.

• "Eli Stone" .... Ashley Cardiff (2 episodes, 2008)
       - Owner of a Lonely Heart (2008) TV episode .... Ashley Cardiff
       - Help! (2008) TV episode .... Ashley Cardiff
• Noise (2007/II) .... Helen Owen
• "Six Degrees" .... Whitney Crane (14 episodes, 2006-2007)
  ... aka 6° (USA: promotional title)
       - A Simple Twist of Fate (2007) TV episode .... Whitney Crane
       - Objects in the Mirror (2007) TV episode .... Whitney Crane
       - Surstromming or a Slice (2007) TV episode .... Whitney Crane
       - Ray's Back (2007) TV episode .... Whitney Crane
       - Sedgewick's (2007) TV episode .... Whitney Crane
        (9 more)
• Prey (2007) .... Amy Newman
• Unknown (2006) .... Eliza Coles
• Gray Matters (2006/I) .... Charlie Kelsey
• Lord of War (2005) .... Ava Fontaine
• I, Robot (2004) .... Susan Calvin
  ... aka I, Robot (Germany)
• The Recruit (2003) .... Layla Moore
• The Sum of All Fears (2002) .... Dr. Cathy Muller
  ... aka Der Anschlag (Germany)
• "Going to California" .... Lily (1 episode, 2001)
       - Lily of the Field (2001) TV episode .... Lily
• Serendipity (2001) .... Halley Buchanan
• "Sex and the City" .... Natasha (7 episodes, 1999-2000)
       - What Goes Around Comes Around (2000) TV episode .... Natasha
       - Running with Scissors (2000) TV episode .... Natasha
       - Easy Come, Easy Go (2000) TV episode .... Natasha
       - Drama Queens (2000) TV episode .... Natasha
       - Attack of the Five Foot Ten Woman (2000) TV episode .... Natasha
        (2 more)
• Whipped (2000) .... Marie